Mahaveera is an action drama. A poor farmer Dharam (Vinod Mehra) lives happily with his pregnant wife and son, Deepak. However, their life takes a turn when a cunning landlord, Thakur Amrit Singh (Raza Murad) tries to capture his land, but when Dharam resists, he gets killed. Meanwhile, his wife gives birth to a daughter, Dolly. The siblings grew up in poverty and couldn’t afford education. Thus, Dolly (Dimple Kapadia) decides to work as a maid for Thakur Amrit Singh, while Deepak (Raj Babbar) goes out to finish his studies. One day, Thakur tries to molest Dolly, but she manages to run away with the help of a dacoit (Dara Singh), and vows revenge from Thakur. Deepak returns as a cop, and is shocked to learn that his sister is now on the other side of the law. Will Deepak be able to make things right for his sister again?